Dynamic seal device for a leakproof rotary joint

Abstract

The utility model relates to the technical field of anti -leakage swivel joint, and disclose dynamic sealing device of anti -leakage swivel joint, including swivel joint, the end of swivel joint is fixedly connected with the connecting sleeve ring, the side surface of connecting sleeve ring is fixedly connected with spiral connecting pipe away from swivel joint, the inner wall of connecting sleeve ring is equipped with annular recess, the inner wall of annular sliding slot is equipped with annular frame, the sidewall of annular frame is fixedly connected with sealing compression circle. The metal elastic strip provided by the utility model has good elastic recovery capacity, can always promote annular frame to drive sealing compression circle to compress to the direction of the rotating component of butt joint, even if sealing compression circle appears trace loss because of long -term wear, metal elastic strip can also compensate the wear amount through the elastic deformation, maintains the close contact of sealing compression circle and butt joint component, ensures that dynamic sealing performance is long -term stable, prolongs the service life of sealing device.

Description

Technical Field

[0001] This utility model relates to the field of leak-proof rotary joint technology, and in particular to a dynamic sealing device for leak-proof rotary joints. Background Technology

[0002] A rotary joint is a key connection device used to achieve stable transmission of fluid, steam, or electrical energy between stationary pipes and rotating equipment, while ensuring a leak-proof seal. Its core value lies in resolving the contradiction between relative rotational motion and leak-proof transmission of the medium. It is widely used in industries such as machine tools, metallurgy, papermaking, plastics, and printing and dyeing, and is a core component for ensuring the normal operation of rotating equipment.

[0003] In the prior art, during the use of rotary joints, a sealing component is installed at the connection point of the joint end. Conventional sealing components wear out after long-term use, which can lead to deformation and affect the subsequent sealing effect. The position of the sealing component cannot be adjusted according to the usage requirements, which will affect the subsequent use of the rotary joint. Utility Model Content

[0004] The purpose of this invention is to solve the problems in the prior art by proposing a dynamic sealing device for a leak-proof rotary joint.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A dynamic sealing device for a leak-proof rotary joint includes a rotary joint, a connecting collar fixedly connected to the end of the rotary joint, a spiral connecting pipe fixedly connected to the side of the connecting collar opposite to the rotary joint, an annular groove formed on the inner wall of the connecting collar, an annular frame slidably provided on the inner wall of the annular groove, a sealing pressure ring fixedly connected to the side wall of the annular frame, and a metal elastic strip fixedly connected to the inner wall of the connecting collar located in the annular groove, the end of the metal elastic strip being pressed against the side wall of the annular frame.

[0006] Preferably, a sealing gasket is provided at the connection between the spiral connecting pipe and the connecting collar.

[0007] Preferably, the sidewall of the sealing ring is provided with multiple annular toothed grooves, and the inner wall of the connecting collar located at the annular groove opening is fixedly connected with a retaining ring.

[0008] Preferably, the inner wall of the ring frame has a notch, and a pressure block is fixedly connected to the inner wall of the ring frame at the notch.

[0009] Preferably, a controller is fixedly connected to the inner wall of the connecting collar, a pressure sensor is disposed inside the annular groove of the connecting collar, and an alarm is fixedly connected to the side wall of the connecting collar. The pressure sensor and the alarm are electrically connected to the controller respectively.

[0010] Preferably, the bottom of the ring frame is provided with a slot, and a connecting sleeve is provided at the connection between the pressure sensor and the controller, the connecting sleeve being disposed through the slot.

[0011] Compared with the prior art, this utility model provides a dynamic sealing device for a leak-proof rotary joint, which has the following beneficial effects: 1. The dynamic sealing device of this leak-proof rotary joint has a metal elastic strip with good elastic recovery ability. It can always push the ring frame to press the sealing pressure ring towards the rotating part to be connected. Even if the sealing pressure ring is slightly worn due to long-term wear, the metal elastic strip can compensate for the wear through elastic deformation, maintain the tight contact between the sealing pressure ring and the part to be connected, ensure the long-term stability of dynamic sealing performance, and extend the service life of the sealing device.

[0012] 2. The dynamic sealing device of this leak-proof rotary joint works by gradually increasing the pressure inside the annular groove when the sealing ring fails and the medium seeps into it. At the same time, the metal elastic strip pushes the annular frame to move, causing the pressure block to press against the pressure sensor. After the pressure sensor detects the pressure change, it transmits the pressure signal to the controller. The controller analyzes the signal, and if the pressure exceeds the preset safety threshold, it immediately controls the alarm to issue an audible and visual alarm, reminding the staff to replace the sealing components in time.

[0013] 3. The dynamic sealing device of this leak-proof rotary joint, through the sealing gasket set at the connection between the spiral connecting pipe and the connecting collar, can fill the gap between the two to form the first static seal, preventing the medium from leaking from the connection between the connecting collar and the spiral connecting pipe. The fixed retaining ring fixed on the inner wall of the annular groove opening of the connecting collar can limit the sliding range of the annular frame, prevent the annular frame from falling out of the annular groove, and ensure that the sealing pressure ring is always in an effective sealing position. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural view of the dynamic sealing device for the leak-proof rotary joint proposed in this utility model. Figure 2 This is a structural cross-sectional view of the dynamic sealing device for the leak-proof rotary joint proposed in this utility model; Figure 3 for Figure 2 Enlarged structural diagram of part A in the middle section; Figure 4 for Figure 1 Three-dimensional view of the structure of the central sealing ring.

[0015] In the diagram: 1. Rotary joint, 2. Connecting collar, 3. Spiral connecting pipe, 4. Sealing gasket, 5. Ring frame, 6. Sealing pressure ring, 7. Fixing retaining ring, 8. Metal elastic strip, 9. Pressure block, 10. Controller, 11. Pressure sensor, 12. Alarm, 13. Connecting sleeve. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Reference Figure 1-4 A dynamic sealing device for a leak-proof rotary joint includes a rotary joint 1. A connecting collar 2 is fixedly connected to the end of the rotary joint 1. A spiral connecting pipe 3 is fixedly connected to the side of the connecting collar 2 opposite to the rotary joint 1. An annular groove is formed on the inner wall of the connecting collar 2. An annular frame 5 is slidably provided on the inner wall of the annular groove. A sealing pressure ring 6 is fixedly connected to the side wall of the annular frame 5. A metal elastic strip 8 is fixedly connected to the inner wall of the connecting collar 2 located in the annular groove. The end of the metal elastic strip 8 is pressed tightly on the side wall of the annular frame 5. Multiple annular toothed grooves are formed on the side wall of the sealing pressure ring 6.

[0018] A pressure block 9 is fixedly connected to the inner wall of the annular frame 5 in the recess. A controller 10 is fixedly connected to the inner wall of the connecting collar 2. A pressure sensor 11 is installed inside the annular groove of the connecting collar 2. An alarm 12 is fixedly connected to the side wall of the connecting collar 2. The pressure sensor 11 and the alarm 12 are electrically connected to the controller 10 respectively. A slot is opened at the bottom of the annular frame 5. A connecting sleeve 13 is provided at the connection between the pressure sensor 11 and the controller 10. The connecting sleeve 13 is installed through the slot.

[0019] The rotary joint 1 is the core component for media transmission, used to achieve media communication between the fixed pipeline and the rotating equipment. The connecting collar 2 fixed at its end is the installation carrier of the sealing structure. At the same time, it is connected to the external pipeline through the spiral connecting pipe 3. The spiral connecting pipe 3 adopts a threaded connection method to ensure a firm fixation with the external pipeline.

[0020] The sealing ring 6 is made of elastic sealing materials such as rubber and polytetrafluoroethylene. Multiple annular grooves on its sidewall can enhance the sealing effect. When the rotary joint 1 rotates, the sealing ring 6 is in close contact with the mating rotating parts such as the equipment shaft. The annular grooves can further fill the contact gap, forming multiple sealing barriers to prevent the medium from leaking from the dynamic contact surface.

[0021] The connecting collar 2 has a metal elastic strip 8 fixed to the inner wall of the annular groove. Its end is pressed against the side wall of the annular frame 5, providing continuous elastic pressure to the annular frame 5. The metal elastic strip 8 has good elastic recovery ability and can always push the annular frame 5 to press the sealing ring 6 towards the rotating part to be connected. Even if the sealing ring 6 suffers slight wear due to long-term wear, the metal elastic strip 8 can compensate for the wear through elastic deformation, maintain the tight contact between the sealing ring 6 and the connecting part, ensure long-term stable dynamic sealing performance, and extend the service life of the sealing device. The pressure block 9 fixed at the recess of the inner wall of the annular frame 5 can enhance the structural strength of the annular frame 5, prevent the annular frame 5 from deforming under the pressure of the metal elastic strip 8, and ensure the uniformity of the force on the sealing ring 6.

[0022] When the sealing ring 6 fails and the medium seeps into the annular groove, the pressure inside the groove will gradually increase. At the same time, the metal elastic strip 8 pushes the annular frame 5 to move, causing the pressure block 9 to press against the pressure sensor 11. After detecting the pressure change, the pressure sensor 11 transmits the pressure signal to the controller 10. The controller 10 analyzes the signal. If the pressure exceeds the preset safety threshold, it immediately controls the alarm 12 to issue an audible and visual alarm, reminding the staff to replace the sealing components in time to avoid losses caused by a large leakage of the medium. The connecting sleeve 13 set at the connection between the pressure sensor 11 and the controller 10 passes through the groove at the bottom of the annular frame 5, which can protect the connection line between the two. At the same time, when the annular frame 5 slides, the groove provides clearance space for the connecting sleeve 13, without affecting the normal movement of the annular frame 5.

[0023] To ensure that the sealing ring 6 is always in an effective sealing position, such as Figure 1-4 As shown, a sealing gasket 4 is provided at the connection between the spiral connecting pipe 3 and the connecting collar 2. A fixing retaining ring 7 is fixedly connected to the inner wall of the connecting collar 2 at the annular groove opening. A notch is provided on the inner wall of the annular frame 5.

[0024] The sealing gasket 4 provided at the connection between the spiral connecting pipe 3 and the connecting sleeve 2 can fill the gap between them, forming the first static seal and preventing the medium from leaking from the connection between the connecting sleeve 2 and the spiral connecting pipe 3. The fixing retaining ring 7 fixed on the inner wall of the annular groove of the connecting sleeve 2 can limit the sliding range of the annular frame 5, prevent the annular frame 5 from falling out of the annular groove, and ensure that the sealing pressure ring 6 is always in an effective sealing position.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A dynamic sealing device for a leak-proof rotary joint, comprising a rotary joint (1), characterized in that: The end of the rotary joint (1) is fixedly connected to a connecting collar (2). A spiral connecting pipe (3) is fixedly connected to the side of the connecting collar (2) away from the rotary joint (1). An annular groove is provided on the inner wall of the connecting collar (2). An annular frame (5) is slidably provided on the inner wall of the annular groove. A sealing pressure ring (6) is fixedly connected to the side wall of the annular frame (5). A metal elastic strip (8) is fixedly connected to the inner wall of the connecting collar (2) located in the annular groove. The end of the metal elastic strip (8) is pressed and set on the side wall of the annular frame (5).

2. The dynamic sealing device for the leak-proof rotary joint according to claim 1, characterized in that: A sealing gasket (4) is provided at the connection between the spiral connecting pipe (3) and the connecting collar (2).

3. The dynamic sealing device for the leak-proof rotary joint according to claim 1, characterized in that: The sealing ring (6) has multiple annular toothed grooves on its side wall, and the connecting collar (2) has a fixed retaining ring (7) fixedly connected to the inner wall of the annular groove opening.

4. The dynamic sealing device for the leak-proof rotary joint according to claim 1, characterized in that: The inner wall of the ring frame (5) has a notch, and a pressure block (9) is fixedly connected to the inner wall of the ring frame (5) at the notch.

5. The dynamic sealing device for the leak-proof rotary joint according to claim 1, characterized in that: A controller (10) is fixedly connected to the inner wall of the connecting collar (2). A pressure sensor (11) is provided inside the annular groove of the connecting collar (2). An alarm (12) is fixedly connected to the side wall of the connecting collar (2). The pressure sensor (11) and the alarm (12) are electrically connected to the controller (10) respectively.

6. The dynamic sealing device for the leak-proof rotary joint according to claim 5, characterized in that: The bottom of the ring frame (5) is provided with a slot, and a connecting sleeve (13) is provided at the connection between the pressure sensor (11) and the controller (10), and the connecting sleeve (13) is provided through the slot.

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